What are the dimensions of the coefficient matrix and the augmented matrix in a system of two linear equations in two variables? Additionally, what is the main difference between these two types of matrices? A) Dimensions of coefficient and augmented matrices in a 2x2 system; B) Difference between coefficient and augmented matrices in a 2x2 system; C) Coefficient and augmented matrix dimensions in a 2x2 system; D) Main difference between coefficient and augmented matrices in a 2x2 system.